I would get the newer X5 50i. It's no joke in the power department. I had a FBO 2013 335i and this thing would walk it. With a few simple modifications like a Dinantronics or some other tune it will come close to a stock X5M (especially e70). If you decide to do more than just a tune you'd probably make just as much power as a stock X5M.
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2014 X5 xDrive50i Mineral White | DinanTronics Stage 1 | Vossen HC3
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